part1: http://www.dailymotion.com/video/xo9bux_2012-national-geographie-part1<br />part3: http://www.dailymotion.com/video/xo9cby_2012-national-geographie-part3<br />autre doc<br />http://www.dailymotion.com/video/xo9anc_theorie-du-complot-2012-part1_news
